Crystal oscillators are loosely divided with the frequency they perform at and whether they are fundamental oscillators—do the job within the frequency marked to the can or at even multiples of that (overtone oscillators). We existing a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output according to the orthogonal https://bookmarkspring.com/story13830283/little-known-facts-about-bulk-crystal-oscillator